Piston packing-ring



- against the side walls of the groove.

UNITED STATES PATENT orsics.

SAMUEL WIL$0N MUBBQW, Cl]? BALTIMORE, MARYLAND. ASSIGNUR T0 Til'lli EH08. COMPANY, A. CDRPUMA'I'ION OLE Mi'tRYLAliilll.

PISTON PACKING-IttING.

Specification of Letters Patent.

Patent-ml th 1 "ti, lll'kl llh.

T 0 all whom it may concern:

Be it known that I, Saarinen l l n son Monnow, a citizen of the United States, and rest dent of Baltimore, Maryland, have invented certain new and useful Improvements in Piston Packing-Rings. of which the follow in" is a specification.

lily invention is designed to provide a piston packing ring organization which will insure a close working joint and seal with the cylinder wall and also with the walls oi the groove in the piston in which the packing-ring is located.

The invention is particularly well adapted for automobile engines and will prevent the passageof oil into the combustion chamher along the cylinder wall and also prevent the escape of gas and will also furnish a seal to prevent the passage of oil and gas into the groove of the piston'and under and past the packing ring.

In the accompanying drawings:

Figure 1 is a sectional view of a portion of a piston and cylinder wall with my improvedpacking in place.

- Fig. 2 shows the several parts of the packing ring organization in edge view and separated from each other.

Fig. 3 is aperspective view of a portion of the two main members of the packing ring.

In these drawings 1 indicates a portion of a piston and 2 a portion of the wall of the cylinder. 1

The piston has a circumferential groove 3 as in ordinary practice and within this groove is located the packing ring organiza tion consisting of a main member 1 and a companion member 5, each. of these members beingin the form oil a split ring haw ing side faces 6 in planes at right-angles to the axis of the rings and of. the piston and cylinder, so that when these members are in place within the groove of the piston the faces (5 will .tit throughout their entei'it The two members 4 and 5 are interlocked by a rib'7 on the member fitting into a recess 8 in the member 5. This rib extends an nularly around the edge oi the member land the recess 8 likewlsc extends annularlv around the edge of the member lilach member is formed with an inner face 9 er.

tending at an inclination to the axis oil the ring, these traces diverging lnwardly from the point 10 where they meet at the base ot' the lip or rib 7' and recess 8.

When the pa its 4 and 5 are in cooperative relation annular space is provided between them of triangular shape in cross section and in this space a spreader member ll is. located. having its outer tacc rounded. This 7 spreader member is made of spring mate rial and is open 0' split at one point. and

forming a sea-led joint at sach t these points. so that the oil and gas is prevented :lroni passing down and under the packing ring organization and up. on the other side, thus pregenting; the passage of oil to the combustion c'han'lher, or the escape of gas 'thcrcl rom past the piston. lvlomhcr llv is preferably wholly contained within the gin pro formed by the inclined 't'aces 9 (oil the two split ring members. By' giving to member ll. an are shaped bearing face and a "RISE corresponding to the chord of said.

arc. a large ring may he used in a con'ipara ttvely shallow groove. its shown in Fig. l,

the base member 11 being greater than onelialt the width oi? the groove. permits the spring member to be securely held in place by one of the split ring inemhtn's'nhile asseiubling the organization.

Further it will be noticed that h reason of the interlock afforded by the rib 7 and. recess a sealed joint will be maintained be tween the ring members 4t and ii themselves, thus prevent ng the passage of oil or gas inwardly between the adjacent faces or edges of these members.

Furthermore by reason this interlockinn; joint between the ring .rnei'nhers they .ill. be held accure ely in" their prescribed, relation with th side 'vrallsdn planes at rightangles to the of the piston, so that contact will he a ded throiwhout these and also the peripheral faces of the rings will be maintained concentric with the axis of the piston and cylinder to insure contact throughout these peripheral faces and the cylinder wall.

The interlockingrib and recess form a guiding connect-ion between the two ring members, so that as they separate under Wea ring conditions they will maintain their true relation to each other with their side faces to bear throughout against the walls of the grooves and with their peripheral faces to bear throughout against the c vlinder wall.

What- I claim is:

1, A piston packing consisting of three ring-shaped members, one having a recess at its inner Corneropen peripherally and laterally and having an inner t'rusto-conical surface extending from the inner corner of the recess toward the axis of the ring, a second member having a rib overlapping into said recess and having an inner trusto-conical surface extending from the base of the rib toward the axis of the ring said friistoconical siirlaces meeting at substantially the. center of the ring and coii a'raiing to term a V shaped groove. and a spring ring bearing on said l'rusio-conical siirt'accs said spring ring bein ot a width greater than halt the width ot the piston ring groove.

2. A piston packing consisting of three ring-shaped members. one having a recess at its inner corner opcn periphci'all and laterally and having an inncinl'rusto-conical siirtace extending from the plane ot the inner corner ol' the,rccess toward the axis of the ring. a second member having a rib overlapping into said recess and having an inner triisto conical siirl'acc. extending l'roni the plane of the base of the rib toward the axis ol the ring. said l'i-iisti) i-i)|iic:il siirtaces meeting at siilistailthillv the center of the ring and k operating to tUIlll a V shaped groove, and a spring ring bearing on said 'l'riisto-conical siirl'accs. said spring ring being of a width greater than hall' the \vidth of the piston ring groove.

in testimony whereof I allix Ill) signature.

bililll tlli ll'llir-illX lltlllllUll' 

